JPH0721654A - Cartridge elevating and lowering mechanism - Google Patents

Abstract

PURPOSE:To improve operability and vibration resistance by making the drop-in action of a cartridge holder in a drive unit compatible with the floating action of the drive unit. CONSTITUTION:The cartridge holder 5 holding a cartridge is set in freely ascendable/descendable with respect to the drive unit 1. By forming a holder pin 7 in the cartridge holder 5, a movable guide member 9 is provided proximately to the cartridge holder 5. A cam hole for guiding the holder pin 7 is formed on the guide member 9 and a clearance hole 10 having a diameter larger than the action stroke of the floating action of the drive unit 1 is formed continuously to the end of the cam hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge raising / lowering mechanism for raising and lowering a cartridge containing a recording medium with respect to a drive unit, and more particularly to a cartridge raising / lowering mechanism adopted in a device in which a drive unit is attached to a chassis in a floating manner. It is related to the mechanism.

[0002]

2. Description of the Related Art At present, with the development of digital audio equipment, a mini disk (hereinafter referred to as MD) has appeared as an extremely compact recording medium and has been attracting attention. Since this MD is housed in a cartridge for the purpose of protecting it, it is necessary to set it in the drive unit in the player while opening the shutter provided in the cartridge. Therefore, the MD player is provided with a cartridge holder for holding the cartridge, and the shutter opening / closing means is provided in the cartridge holder. In such an MD player, when the cartridge is pulled into the cartridge holder, the shutter opening / closing means opens the shutter and then the cartridge can be set in the drive unit.

Further, the drive unit has a turntable for rotating the MD, and in order to set the MD on the turntable, a cartridge elevating mechanism for dropping a holder accommodating a cartridge into the drive unit is used. This cartridge elevating mechanism uses a cam provided on a slide plate that moves in the horizontal direction to drop the cartridge holder. That is, after the cartridge is horizontally moved upward in the cartridge holder to the turntable, the entire cartridge holder is lowered by using the cam, so that the cartridge inside the holder is also lowered on the turntable at the same time. Generally, high operability is ensured by adopting a cartridge lifting mechanism in which a slide plate having the cam is moved by a drive motor.

[0004]

By the way, in a disc player such as a vehicle-mounted type, a drive unit is attached to a chassis in a floating manner. According to such a disc player, since the drive unit performs a floating operation during reproduction of the disc, vibration due to an external force can be absorbed, and excellent vibration resistance can be exhibited.

At present, it is desired to put an MD player equipped with a drive unit for performing the floating operation into practical use. However, in the MD player that performs the above-described cartridge holder dropping operation, it is impossible to attach the drive unit to the chassis in a floating manner. That is, since the cam for lowering the cartridge holder is slidably provided on the chassis side of the player, the cam cannot be separated from the chassis side. Therefore, the cartridge holder moved by the cam cannot be moved because it is restricted by the cam as it is. As a result, the drive unit also remains integrated with the chassis side via the cassette holder and the cam, and the floating operation is impossible.

As described above, in the prior art, the operation of dropping the cartridge holder into the drive unit,
It was not possible to achieve both floating operation of the drive unit, and it was not possible to exhibit high operability and excellent vibration resistance at the same time. In addition, such a problem is
This is common not only to D players but also to devices for reproducing recording media contained in cartridges.

The present invention has been proposed in order to solve the above problems, and an object of the present invention is to achieve both the operation of dropping the cartridge holder into the drive unit and the operation of floating the drive unit, and operating the same. It is an object of the present invention to provide a cartridge elevating mechanism that improves the vibration resistance and vibration resistance.

[0008]

To achieve the above object, according to the present invention, a cartridge holder for holding a cartridge is provided on a drive unit so as to be able to move up and down, and a holder pin is fixed to the cartridge holder so as to be close to the cartridge holder. Is provided with a freely movable guide member, and a cam hole for guiding the holder pin is formed in this guide member.By the movement of the guide member, the cam hole raises and lowers the holder pin to move the cartridge holder up and down. It is a structural feature that a large-diameter hole having a diameter larger than the operation stroke in the floating operation of the drive unit is formed continuously to the end of the cam hole.

[0009]

In the present invention having the above construction,
The guide member moves and the cam hole lowers the holder pin to drop the cartridge holder onto the drive unit. When this dropping operation is completed, the holder pin moves from the cam hole into the large diameter hole. Since the large-diameter hole has a diameter larger than the operation stroke of the drive unit during floating operation, the holder pin does not collide with the large-diameter hole even when the drive unit performs floating operation, and the drive unit operates in stable floating operation. It can be performed.

[0010]

【Example】

[Structure of the Present Embodiment] An embodiment of the present invention will be specifically described below with reference to FIGS. 1 is a left side view of the present embodiment, FIG. 2 is a front view of the same, and FIGS. 3A to 3C are side views showing the operation of the present embodiment.

The present embodiment is applied to an MD player in which a drive unit 1 for reproducing an MD contained in a cartridge C (shown in FIG. 2) is attached to a chassis 2 in a floating manner. Side plate portions extending upward are erected on both side edge portions of the drive unit 1, and guide grooves 1a cut out in the vertical direction are formed therein. Further, damper shafts 3 projecting outward are provided on both side edges of the drive unit 1,
The tip of the damper shaft 3 is inserted into a damper 4 fixed to the chassis 2 side (only the right side of the damper shaft 3 and the damper 4 is shown in FIG. 2).

A cartridge holder 5 for holding the cartridge C is arranged above the drive unit 1. An insertion opening 5a for inserting the cartridge C is formed at the front edge of the cartridge holder 5. A guide pin 6 protruding rightward is fixed to the right edge portion of the cartridge holder 5, and a holder pin 7 protruding leftward is fixed to the left edge portion of the cartridge holder 5, respectively. The pins 6 and 7 are inserted into the guide groove 1a. Further, a holder spring 8 is attached between the cartridge holder 5 and the drive unit 1. The holder spring 8 urges the cartridge holder 5 to the drive unit 1 side, that is, the lower side.

A guide member 9 (shown by a thick line in FIG. 1) that is movable in the front-rear direction is provided near the left side edge of the cartridge holder 5. The guide member 9 is formed with a cam hole 9a for guiding the holder pin 7. The cam hole 9a is inclined downward toward the back side,
The holder pin 7 is brought into contact with the holder pin 7 from below and the holder pin 7 is moved up and down by moving the guide member 9. The guide member 9 is configured to move in the front-rear direction by a drive source (not shown).

Further, the cam hole 9a is provided at the rear end of the cam hole 9a.
An escape hole 10 is formed continuously with a. The diameter of the escape hole 10 is set larger than the operation stroke in the floating operation of the drive unit 1.

[Operation of this Embodiment] In the present invention having the above-described structure, the guide member is driven by the drive source (not shown) from the state where the cartridge holder 5 stores the cartridge C (the state shown in FIG. 3A). 9 moves to the front side. Then, the holder pin 7 is attached to the inclined portion of the cam hole 9a.
When reaches, the spring force of the holder spring 8 urges the cartridge holder 5 downward, so that the holder pin 7 descends along the cam hole 9a (state of FIG. 3B). At the same time, the holder pin 7 and the guide pin 6 have the guide groove 1a.
Along which the cartridge holder 5 is
The lowering operation is performed until the cartridge C is placed on the drive unit 1.

At the time when the dropping operation of the cartridge holder 5 is completed, the holder pin 7 moves from the cam hole 9a into the escape hole 10 (state of FIG. 3C). Escape hole 10
Has a diameter larger than the operation stroke of the drive unit 1 in the floating operation, the holder pin 7 does not collide with the escape hole 10 even when the drive unit 1 performs the floating operation. Therefore, the drive unit 1 can stably perform the floating operation.

According to the present embodiment as described above, it is possible to make both the drop operation of the cartridge holder 5 into the drive unit 1 and the floating operation of the drive unit 1 compatible, and high operability and excellent vibration resistance. Can be demonstrated at the same time. It should be noted that the present invention is not limited to the above-described embodiments, and the shape, size, etc. of each constituent member can be appropriately changed.

[0018]

As described above, according to the present invention, a large-diameter hole having a diameter larger than the operation stroke in the floating operation of the drive unit is formed continuously with the end of the cam hole for guiding the holder pin of the cartridge holder. With the structure of forming the cartridge holder, it is possible to provide the cartridge lifting mechanism that improves the operability and the vibration resistance by making the dropping operation of the cartridge holder into the drive unit and the floating operation of the drive unit compatible.

[Brief description of drawings]

FIG. 1 is a left side view showing an embodiment of the present invention (a state in which a cartridge holder 5 has been dropped in).

FIG. 2 is a front view of the present embodiment (a state in which the cartridge holder 5 stores the cartridge C).

3A and 3B are side views showing the operation of the present embodiment, where FIG. 3A is a state in which the cartridge holder 5 stores the cartridge C, FIG. 3B is a state in which the holder pin 7 is lowered, and FIG. 3C is a state in which the cartridge holder 5 is dropped. End status of jamming operation

[Explanation of symbols]

 1 Drive Unit 2 Chassis 3 Damper Shaft 4 Damper 5 Cartridge Holder 5a Insertion Port 6 Guide Pin 7 Holder Pin 8 Holder Spring 9 Guide Member 9a Cam Hole 10 Relief Hole C Cartridge

Claims (1)

[Claims] 1. A drive unit for reproducing a recording medium housed in a cartridge is used in a device floatably attached to a chassis, wherein a cartridge holder for holding the cartridge moves up and down with respect to the drive unit. A guide pin that is freely provided, has a holder pin fixed to the cartridge holder, and is movable near the cartridge holder, and has a cam hole that guides the holder pin formed in the guide member. In a cartridge lifting mechanism for moving a cartridge pin to move a holder pin up and down to move a cartridge holder up and down, a diameter larger than an operation stroke in a floating operation of the drive unit is continuous with an end of the cam hole. Cartridge lifting mechanism, characterized in that the diameter hole is formed.